#include <iostream>
#include <string>
using namespace std;
int main(){
    string s;
    cin >> s;
    for(int i = 0; i < s.size();i++){
        if(i % 2 == 0 && i!=0 )   cout << "*";
        cout << s[i];
    }
    cout << endl;

    return 0;
}
